Simple Maths Puzzle On Radio 4 Has Left Everyone Completely Stumped

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The BBC’s Today Show on Radio Four has left listeners scratching their heads after launching a brand new mathematical puzzle feature.

Too many people are painfully frightened of maths, perhaps harbouring negative memories of strict teachers and half finished exam papers. A 2012 study even found that, for some people, merely anticipating having to do maths actually frazzles the same parts of the brain that pain does. Ouch.

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However, improving your maths confidence at any age is totally doable, and can even be really enjoyable, as shown through the new Puzzle for the Day. This is a joint initiative between Radio 4 and GCHQ and requires listeners to unleash their inner code breaker.

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The Puzzle

The first brainteaser in the series to unite Radio 4 listeners in frustration is as follows:

First, take the digits 1,2,3 all the way up to 9 in numerical order.

Put either a plus sign, minus sign or neither between the digits in order to make a sum that adds up to 100.

For instance, one way to achieve this would be 1+2+34-5+67-8+9=100. Then work out the fewest number of pluses and minuses needed in order to achieve this.

Not to pile on the pressure or anything, but Year 6 pupils at Parkgate Primary in Cheshire have got this down to four, so yeah…

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Frustratingly, listeners won’t find out the answer until tomorrow morning at 6am, when the sum with the fewest number of pluses and minuses will be published on the Today website.

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In the mean-(mode and median…)-time, amateur mathematicians are taking to Twitter to puzzle things out together.

This new Radio Four feature is already helping to demystify maths, and is also a pretty great excuse to get competitive while (hopefully) looking like a smarty pants.

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Let us know how you get on!